Patents by Inventor Erik Arne Bergqvist

Erik Arne Bergqvist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 3984178
    Abstract: A discontinuous wide-angle optic for use in a light receiver or transmitter comprises a partial spherical element having a planar boundary surface superposed on the base surface of a pyramidal facet reflector provided with a plurality of inclined facet surfaces, one for each of a plurality of directions of incidence of light passing through the spherical surface of said spherical element. When used in a light receiver, the spherical surface functions as a positive lens to cause entering light rays to converge toward one of the facet surfaces of the reflector for reflection therefrom into an image plane located at a diaphragm formed on a surface of said partial spherical element spaced from its said planar boundary surface.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: October 5, 1976
    Assignee: Aktiebolaget Bofars
    Inventor: Erik Arne Bergqvist